Oven-door.



T in.

WILLIAM R. JEAVONS, OF CLEVELAND, OHIO.

OVEN-DOOR.

Specification of Letters Patent.

Patented Nov. 14, 1911.

Application filed November 12, 1910. Serial No. 591,988.

To all whom it may concern:

Be it known that I, WILLIAM R. JEAvoNs, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Qhio, haveinvented a certain new and useful Improvement in Oven-Doors, of whichthe following is a full, clear, and exact description, reference beinghad to the accompanying drawings.

This invention relates to oven doors and, while some of the features areof general application, the improvements shown herein are moreparticularly adapted to oven doors for gas and oil stoves and are intended to enable the operator to observe the conditions which existwithin the oven through one or more panes of transparent material, theconstruction by which the said pane or panes are secured in place beingeconomical of production, extremely eflicient in operation, andpermitting the ready insertion of a pane or panes into, and theirremoval from, the door.

A further object of the invention is to provide a door of this type inwhich crdinary glass may be used for the panes without sacrificing anyof the efliciency of the oven, while the construction reduces to aminimum the liability of breaking such panes.

With the foregoing objects in, view, the invention may be definedfurther and gen erally as consisting of the combinations of elementsembodied in the claims hereto annexed and illustrated in the drawingsforming parthereof, wherein- Figure 1 represents an elevation of an ovendoor constructed in accordance with my invention, showing the sameapplied to an oven of ordinary or standard type; Fig. 2 a detail inelevation of the inner face of the door Fig. 3 a vertical sectional viewcorresponding to the line 33 of Fig. 2; and Fig. 4 is a transversesectional view corresponding to the line 4-4 of Fig. 2.

The door illustrated herein is composed of a sheet metal outer plate 1and a sheet metal lining plate 2, the lining plate be ing secured inplace by bending the edges of the outer plate around the edges of thelining plate, as shown at 3. Near their outer edges the outer and innerplates are spaced apart by offsetting the body of the inner plate fromthe adjacent portion of the outer plate, forming a non-heat conductingspace adjacent to the outer edge of the door. The outer plate 1 and theinner sheet metal, or lining, plate 2, also constitute frames for thereception of the panes of transparent material, to be describedhereinafter.

The outer plate is concaved or bent inwardly to form a bearing for theinner plate or lining adjacent to the central, glazed portion of thedoor, as shown at 5, and the outer plate and lining plate are securedtogether by suitable rivets 6. In the embodiment of my invention shownherein, three transparent panels are provided, which panels are formedby panes of glass 7 and cooperating frames formed by the outer and innerplates. The central portion of the outer plate is open, with theexception of a pair of vertical frame members 8, which are preferablyformed integral with the body of the plate. Each frame member 8comprises a central flat body extending the entire distance between thetop and bottom of the central opening, said body portion being providedat each lateral edge with a bead, overhanging a cooperating portion ofthe inner plate and forming therewith a slide-way for a glass pane. Thebead referred to is shown as having an outwardlybent portion 9 extendingaway from the body of the frame member 8, an inwardly directed portion10, extending toward the complementary part of the inner or lining plateand forming a smooth bearing surface for a pane, and an outwardlydeflected edge 11. At the top and bottom of each pane opening, the edgesof the outer plate adjacent to said opening are bent in the same manner,as the sides, as shown at 12, 13 and 14. v

The metal of the inner or lining plate is cut away to provide openingscorresponding to those in the outer plate and the edges of the liningadjacent to such openings are treated as follows to form with thecooperating portions of the outer plate supporting frames for the panesof glass :At a short distance from the rivets 6 at each side of thecentral opening, the lining is bent inwardly or away from the outerplate, as shown at 15, and is then bent toward the opening to form aflange 16, overhanging the edge of the adjacent portion of the outerplate. The flange 16 will be bent so as to converge somewhat toward theouter plate, forming an acute angle with the flange 15.

The lining is provided with vertical frame members 17 corresponding tothe vertical frame members 8 of the outer plate and secured to thelatter by means of rivets 1 8. The side edges of the vertical members 17are each bent inwardly or away from the outer plate, as shown at 19, andthen convergently toward the adjacent portion of the outer plate, asshown at 20, the flanges 15 and 16, 19 and 20 forming, with the cooperating edges of the outer plate, vertical guides for a pane 7 At thebottom of each panel, the lining is bent inwardly or away from the outerplate, as shown at 21, thence upwardly, toward the adjacent edge of theouter plate, as shown at 22, and at its upper edge is bent inwardly oraway from the outer plate, as

" shown at 23, thereby forming, with the up per edge of the flange 14,an upwardly flared guide for the reception and easy insertion of thelower end of a pane 7. This guide has the rounded surfaces 13 and 22,which are opposed to each other and which bear against the pane. Theinwardly projecting portions 19 and 21 extend away from the outer platea distance at least as great as the thickness of the thickest pane ofglass which will be applied to the opening. The lining plate, being madeof resilient metal and having the edge portions extending from theflanges 19 and 21 deflected toward the plane of the outer plate,guideways are formed which will accommodate ordinary glass platesvarying greatly in thickness and at the same time a tight joint isprovided between each pane and the frame whereby leakage of hot air,etc., from the oven through the pane openings is prevented. Theflexibility of the edge port-ions 16, 20 and 22 is enhanced by theprovision of the corner notches, to be described hereinafter.

At the upper edge of each panel opening, the lining 2 is cut away at apoint above the 7 upper end of the bead 12, the lining projectingdownwardly a sufficient distance to be engaged by the pane, when thelatter is inplace, whereby the removal of the pane is not interferedwith by the lining. The pane, when in place, will bear against therounded surface 13 and the lining will not prevent a tight joint beingformed at this lace. P At the junction of each vertical side flange 16and 20 with a bottom flange 22, the metal of the lining is cut away toform corner notches 24.

Among the advantages of the construction herein described are:

1817. Its ckeapness.-The frame construction for the glass panes is madeup of the necessary parts of they oven door itself, and these parts areof light sheet metal. Furthermore, the operations by which the frameconstruction is provided are simple and inexpensive.

Qnd. Its darabz'lz'ty.The frame construction is so flexible that thedoor may be twisted, warped, or otherwise distorted without materialdanger of breaking the glass panes. This result is secured, not only bythe light, yielding material of which the door as an entirety and theframes are constructed, but by the peculiar manner of con-- structingthe inner frame member from the lining (including the arrangement of therivets and the corner notches 24) whereby the edges of the lining whichbear against the glass are free to flex or bend without exertingunnecessary pressure upon the glass.

3rd. [ts adaptability for ordinary panes of glass such as may bepurchased by the ordinary consumer at small st0res.It is well known thatordinary glass varies greatly in thickness. The flexibility of theflanges 16, 20 and 22 enables the frames to receive panes that varygreatly in thickness and at the same time the construction of the framessecures a tight joint between each pane and its frame, whereby leakageis pre vented. In cutting the pane openings in the outer plate, theedges are more or less rough. By bending these edges slightly outwardly,as shown at 11 and 14, the rough edges are kept out of any chance ofcontact with the glass.

4th. Convenience 0 f repZacement.Should any of the panes happen tobreak, it is an easy matter to remove the broken pane, and theconstruction of the frame permits of the convenient insertion of a newpane, by merely sliding the same downward Within the lateral groovesprovided between the flanges of the inner and outer plates. Thereplacement is so simple that it can be accomplished by achild. Bydeflecting inwardly the portions of the outer plate, shown at 10 and 13,smooth bearings are provided for the glass outside of the inner edges ofthe outer frame member.

Having thus described my invention, What I claim is:

1. In an oven door, the combination of an outer sheet metal plate havingan opening the-rethrough, an inner plate having a corresponding openingtherethrough and secured to the outer plate, said inner plate beingprovided, at each side of and at the bottom of said opening, with aflange projecting away from the outer plate and a flange projectinglaterally from the former flange toward the plane of the outer plate,there being corner notches provided at the junction of each of thelatter side flanges with the corresponding bottom flange and the upperedge of such bottom flange being flared inwardly or away from the upperedge of the corresponding portion of the outer plate.

2. In an oven door, the combination of an outer plate having an openingtherethrough, and a lining plate secured to the outer plate and havingan opening therethrough com plementary to the opening in the outerplate, the portion of the outer plate above the opening therein beingbent or deflected toward and then away from the inner plate to form asmooth bearing and the upper edge of the opening in the lining platebeing located above such deflected portion of the outer plate.

3. In an oven door, the combination of an outer plate having an openingtherethrough and having edge portions formed by bending the metalinwardly and then outwardly to provide smooth bearing surfaces, and alining plate of sheet metal secured to the outer plate and having anopening therethrough complementary to the opening in the outer plate,the metal at the bottom and sides of the opening in the lining plateforming guideways with the adjacent portions of the outer plate and theupper edge of the opening in the lining plate being located above theinwardly deflected portion of the corresponding edge of the outer plate.

4. In an oven door, the combination of an outer frame member having anopening for a pane and having a bottom edge portion adjacent saidopening deflected outwardly, of an inner frame member having acomplementary opening and forming, with the former member, side andbottom guideways for apane, the upper edge of that portion of the innermember which is below said opening being deflected inwardly or away fromthe outer plate.

5.- In an oven door, the combination of an outer and an inner sheetmetal frame member each having an opening therethrough, the openingsbeing arranged to register, the metal. of the inner member adjacent tothe opening therein being formed with an angular bend at the sides andbottom of said opening and being unbent or undeflected at the top ofsaid opening, whereby an opentop guideway is formed between the innerand outer members for a pane, the metal of the outer member being benttoward the inner member at a short distance from the opening therein andhaving its edge portion defining said opening bent away from the innermember, whereby a smooth bearing is provided for the pane against theouter member.

6. In an oven door, the combination of an outer and an inner sheet metalframe member each having an opening therethrough, the openings beingarranged to register, the metal of the inner member adjacent to theopening therein being formed with an angular bend on three sides of saidopening and being unbent or undeflected at the other side of saidopening, whereby an open guideway is formed between the inner and outermembers for a pane, the metal of the outer member being bent toward theinner member at a short distance from the opening therein and having itsedge portion defining said opening bent away from the inner member,whereby a smooth bearing extending substantially entirely around theopening is provided for the pane against the outer member.

7. In an oven door, the combination of an outer and an inner framemember each hav ing an opening therethrough, said openings beingarranged to register, the metal adjacent to the side and bottom of theopening in the inner member being bent or deflected angularly and themetal at the top of said opening being substantially unbent orundeflected to provide an open-top guideway with the outer member, thecorners formed between the bottom and side edge portions of the innermember being notched.

8. In an oven door, the combination of an outer frame member having anopening for a pane and having the metal adjacent to the bottom of saidopening deflected inwardly,

.with the extreme edge portion of such metal deflected outwardly, and aninner frame member having a complementary opening and forming, with theformer member, a substantially U-shaped guideway for a pane, the upperedge of that portion of the inner member which is below the openingbeing deflected inwardly or away from the outer member.

9. In an oven door, the combination of a sheet metal outer frame memberhaving an opening for a pane, and a sheet metal inner frame memberhaving a complementary opening and forming, with the former member, asubstantially U-shaped guideway for a pane, the portions of the innerand outer members adjacent to the base of said guideway being benttoward each other near the opening and being bent away from each otherat the edge of said opening to form a flaring guideway for the receptionof such ane. p In testimony whereof, I hereunto affix my signature inthe presence of two witnesses.

WILLIAM R. JEAVONS.

Witnesses:

J. B. HULL, BRENNAN B. lVEs'r.

Copies Commissioner of Patents,

Washington, D. G.

